Middlings-purifier



(No Model.) 4 Sheets-Sheet 1. w

G. N. SMITH.

MIDDLINGS PURIFIER.

No. 337,207.- Patented Mar. 2, 1886.

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-a Attorneys (No Model.) 4 Sheets-Sheet 2. G, N. SMITH.

MIDDLINGS PURIFIER;

No. 337,207. Patented Mar. 2, 1886.

Tiy'% Attorneys.

N. PETERS, Pholo Lilhwgnphnr Washington. D. C

Q i 4 S h e e t S S h e e t 3 0'. N. SMITH.

MIDDLINGSPURIPIER.

No. 337,207. I Patented Mar. 2, 1 886.

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C. N. SMITH.

MIDDLINGS PURIFIER. No. 337,207. Paten ted Mar. 2', .1886.

4 Sheets-Sheet 4.

UNITE STATES A'rEN'r OFFICE. w

CHRISTIAN N. SMITH, OF DAYTON, OHIO.

MIDDLINGS-PURIFIER.

BPECIFICATION forming part of Letters Patent No. 337,207, dated March 2,1886.

Application filed February 14, 1885. Serial No. 155,916. (No model.)

To all whom it may concern.-

Be it known that I, CHRISTIAN N. SMITH, a citizen of the United States,residing at Dayton, in the county of Montgomery and State of Ohio, haveinvented certain new and useful Iniprovements in Middlings-Purifiers;and I do declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same, reference being hadto the accompanying drawings,

and to letters or figures of reference marked thereon, which form a partof this specification.

Figure l of the drawings is a side view of my purifier. Fig. 2 is across-sectional view of the same, taken on the lines as 00 of Fig. 1.Fig. 3 is a view of the feed end of the machine, partly in section. Fig.4 is a horizontal longitudinal sectional view taken on the lines y g ofFig. 1. Figs. 5 and 6 are different views of the feeder attached to thescreen-frame B. Fig. 7 is a detail plan view of the screen-frame B,showing some of the mechanism for transversely vibrating it. Figs. 8, 9,10, 11, 12, 13, and 14 are detail views; and Fig. 15 is a verticalcentral longitudinal sectional view.

This invention relates to improvements in middlings-purifiers, and itsobjects are to accurately regulate the draft that passes up through thescreen and carries awaythe dust; to feed the screen regularly; toreadily adjust the tension of the screen-cloth and clean the screenefiicientl y.

Reference being bad to the accompanying drawings and to the letters ofreference marked thereon, A represents the general frame of 'themachine, having on top the exhaust-fan a, immediately below which is thedraft-chamber a, extending longitudinally above the separating-chamber aB is the screen-frame, of rectangular form, and extending longitudinallyin the main frame below the separating-chamber, which extendslongitudinally in the main frame and opens below into thescreen-frame,-fr0m the sides of which its sides rise vertically for ashort distance, and then converge upward and inward to the bottom of thedraft-chamber, opening centrally therein for its entire length.

ued into the draft-chamber by the longitudinal valves b 12, arranged inopposite pairs above rods b pass through the, upper part of the mainframe, and are arranged to hold the valves in the desired position. Thescreen frameBishung by means of the rods or straps b, pivoted at theirlower ends to blocks or; studs fixed t0 the sides of said frame andthecurved slotted rods or brackets b, which are fixed to the main frame,and have the upper ends of the rods b adjustably pivoted within theirslots by bolts and washers, as shown.-

XVhen the upper ends of said rods are adjusted in the ends of the slotsnearest the receiv-- ing end of the machine, the screen will fall duringall its motion toward that end, and will carry the material towardthedischarge end during all the reverse motion. In this posit-ion therods will be inclined andthe travel of material will be most rapid. Thetravel will become less rapid as the ends of the rods b are moved in theslots toward the discharging end, and when in the endsof the slotsnearest thereto the rods b will swing equally to each side of aperpendicular line as the screen-frame moves in either direction.

0 is the conveyer-chamber below the screenframe, having its upper parthopper-shaped to collect from the latter, and provided with thelongitudinal conveyers c c, constructed in the usual manner and actuatedby suitable mech anism conjointly with the screen-frame and blower. I

D is a shaft having bearings in brackets or supports fixed in properposition to the front of the main frame, and d d are similar eccentricsfixed upon said shaft and connected with the bottom of the screen-frameat the sides thereof by the eccentric-rods e e, as shown, so that whenthe shaft D is rotated the screenframe is reciprocated. The shaft D haspulleys fixed at proper points upon it, by means of which and suitablebelts the pulleys that rotate the faushaft and theshafts of the conveyers are driven.

The separatingchamber is practically contin-- d is the discharge-spoutfrom the tail end of the screen-frame.

E is the feeder, attached to the front of the main frame in a suitableposition, and moved transversely across the same by means of thebell-crank e and link 6 The feeder is triangular in outline, andissituated immediately within the separating-chamber, with its base overthe front portion of the screen. The bell-crank has one arm pivoted tothe feeder, its angle pivoted to a bracket fixed to a crossbar of themain frame, and the other arm pivoted to the link 6 which connects withthe front cross-bar of the screen-frame. Thus the longitudinal motion ofthe latter gives the feeder a lateral motion. The feeder is fed in frontbya proper hopper, and feeds the screen through an opening, c in thecross-plate e.

F F are opposite longitudinal recesses in the side beams of thescreen-frame. These recesses are on the inner surfaces of the beams, andare covered .by the longitudinallyslotted boards ff.

G is the screeucloth, the side edges of which pass through the slots inthe boards f into the recesses F and are formed into longitudinalpockets 9. To retain the screen in place, lateral strips or-rods g g arepassed into these pockets, and to tighten it laterally larger strips areinserted into the same. The end edges of the screen are tacked tomovablecross-bars which have their ends sliding in recesses in thescreenfraine, and are drawn apart and the screen stretchedlongitudinally by means of the screws g 9 H are parallel longitudinalcleaning-cords running below the screen, with their front ends securedto the crossbar h of the screen frame, near the front of the same, andthence running over a guide-piece, hereinafter described, near the rearof the screen-frame.

II are standards having their lower ends boltedto the insideof the rearof the main frame, behind the guide-piece. The upper end of eachstandard curves forward, and has pivoted upon it a piece, '6, forapurpose hereinafter explained.

J is a transverse bar bolted to the upwardlyextending arms of the piecest t, and having fixed to it the guidepiece j, over which thecleaning-cords pass.

-Kis ashaft oscillating in hearings in brackets depending from the sidesof the screenframe near its rear end. The said shaft passes through therecesses 7c in the downwardly-extending arms of the pieces 13 z, and hassecured to it the rear ends of the cords H. \Vhen the screen-frame movesforward, the bearings of the shaft K are also moved forward in front ofthe pivots of the pieces 73. The upper arms of said pieces and the bar Jand guide-pieces j are consequently turned backward, and the cords Harestretched and made tense with somewhat of a jerk. When the screen-framemoves backward, the pieces i turn in the opposite direction and thecords H are loosened.

The main object of the construction of the chamber a is to equalize theaction of the air over the whole sereencloth. This is accomplished byhaving the valves situated centrally and equal amounts of air enteringfrom both sides. Thus all points of the valves are equally distant fromthe air-entrances, and equal amounts of air pass through all points ofthe cloth. The proper draft is attained by means of the valves b, which,when the draft is too strong, are partially closed by means of the rods22, and partially opened when the draft is too weak.

Having described my invention, what I claim, and desire to secure byLetters Patent,

1. In a middlings purifier,the combination, with the main frame A,longitudinally-reciprocating screen-frameB,and separating-chamber a", ofthe draft-chamber a, valve 1), rods 1), links 11 and a suitableexhaust-fan above,

the draft-chamber, substantially as specified.

2. In a middlingspurifier, the combination of thescreenframe havingitsside bars grooved upon their inner faces, the bolting-cloth havingtubular edges and the boards f, partially overlapping the grooves, so asto confine the rods and cloth, substantially as specified.

8. In a middlings-pnrifier,the combination, with the main frame A,screen-frame B,cleaning-cords H, and shaft K, oscillating in bear ingsin brackets depending from the sides of the screen-frame, near its rearend, of the standards I, having the pieces 6 pivoted upon them,transverse bar J, and guide-pieces j, substantially as specified.

4. In a middlings-purifier, the combination of the reciprocating bolt,the shaft K, journaled upon the screen -frame, near its outer end, thelevers t, fulcrumed in fixed supports, the bar J, and the cordsI-Latt-ached at one end to the screen'frame and at the other to shaft K,and passing over a bar, J, substantiall y as specified.

In testimony whereof I affix my signature in presence of two witnesses.

. CHRISTIAN N. SMITH.

\Vitnesses:

JACOBF. LENTZ, GRAFTON G. KENNEDY.

